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MIPS: Fix delay loops which may be removed by GCC.

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GCC 4.1 and newer remove empty loops.  This becomes a problem when delay
loops get removed.  Fixed by rewriting to user the proper Linux interface
for such delays.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Reported-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Acked-by: John Crispin <blogic@openwrt.org>
This commit is contained in:
Ralf Baechle
2015-11-27 19:17:01 +01:00
parent 1ec218373b
commit c861519fcf
3 changed files with 9 additions and 5 deletions
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4
arch/mips/pci/pci-rt2880.c
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@@ -11,6 +11,7 @@
* by the Free Software Foundation.
*/
#include <linux/delay.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/io.h>
@@ -232,8 +233,7 @@ static int rt288x_pci_probe(struct platform_device *pdev)
ioport_resource.end = RT2880_PCI_IO_BASE + RT2880_PCI_IO_SIZE - 1;
rt2880_pci_reg_write(0, RT2880_PCI_REG_PCICFG_ADDR);
for (i = 0; i < 0xfffff; i++)
;
udelay(1);
rt2880_pci_reg_write(0x79, RT2880_PCI_REG_ARBCTL);
rt2880_pci_reg_write(0x07FF0001, RT2880_PCI_REG_BAR0SETUP_ADDR);